1、BS ISO4251-4:2010ICS 65.060.01; 83.160.30NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDTyres (ply ratingmarked series) andrims for agriculturaltractors and machinesPart 4: Tyre classification andnomenclatureThis British Standard was published under the authori
2、ty of the Standards Policy and Strategy Committee on 31 March 2010 BSI 2010ISBN 978 0 580 63233 4Amendments/corrigenda issued since publicationDate CommentsBS ISO 4251-4:2010National forewordThis British Standard is the UK implementation of ISO 4251-4:2010. Itsupersedes BS AU 50-1.4.3a:1992 which is
3、 withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee AUE/4, Tyres and wheels for motor vehicles.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions
4、of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunityfrom legal obligations.BS ISO 4251-4:2010Reference numberISO 4251-4:2010(E)ISO 2010INTERNATIONAL STANDARD ISO4251-4Third edition2010-03-01Tyres (ply rating marked series) and ri
5、ms for agricultural tractors and machines Part 4: Tyre classification and nomenclature Pneumatiques (srie marquage quivalent nappe) et jantes pour tracteurs et machines agricoles Partie 4: Nomenclature et classification des pneumatiques BS ISO 4251-4:2010ISO 4251-4:2010(E) PDF disclaimer This PDF fi
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10、country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2010 All rights reservedBS ISO 4251-4:2010ISO 4251-4:2010(E) ISO 2010 All rights reserved iiiForeword
11、ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical
12、committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of elect
13、rotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the
14、member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for ident
15、ifying any or all such patent rights. ISO 4251-4 was prepared by Technical Committee ISO/TC 31, Tyres, rims and valves, Subcommittee SC 5, Agricultural tyres and rims. This third edition cancels and replaces the second edition (ISO 4251-4:1992) which has been technically revised. ISO 4251 consists o
16、f the following parts, under the general title Tyres (ply rating marked series) and rims for agricultural tractors and machines: Part 1: Tyre designation and dimensions, and approved rim contours Part 2: Tyre load ratings Part 3: Rims Part 4: Tyre classification and nomenclature Part 5: Logging and
17、forestry service tyres BS ISO 4251-4:2010BS ISO 4251-4:2010INTERNATIONAL STANDARD ISO 4251-4:2010(E) ISO 2010 All rights reserved 1Tyres (ply rating marked series) and rims for agricultural tractors and machines Part 4: Tyre classification and nomenclature 1 Scope This part of ISO 4251 specifies the
18、 classification codes and nomenclature of the ply rating marked series of tyres for agricultural tractors and machines. Tyre designation and dimensions, load ratings, and specific log skidder tyres are given in ISO 4251-1, ISO 4251-2 and ISO 4251-5, respectively. 2 Normative references The following
19、 referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 4223-1:2002, Definitions of some terms used in the tyre in
20、dustry Part 1: Pneumatic tyres 3 Terms and definitions For the purposes of this document the terms and definitions given in ISO 4223-1 apply. 4 Tyre classification and tyre nomenclature Definitions of tyres, depending on their purpose, are given in Table 1. Nomenclature and classification code marki
21、ngs are given in Table 2. The classification code is not part of the size marking and its use is optional. When used, the code shall be clearly separated from the size marking on the tyres. BS ISO 4251-4:2010ISO 4251-4:2010(E) 2 ISO 2010 All rights reservedTable 1 Definition of tyres depending on th
22、eir purpose Tractor-drive wheel tyre A tyre designed to be fitted to driven axles of agricultural and forestry tractors suitable for sustained high torque service Tractor-steering wheel tyre A tyre designed to be fitted to non-driven axles of agricultural and forestry tractors Implement tyre A tyre
23、designed primarily for agricultural machines or implements or for agricultural trailers which is not suitable for sustained high torque service Traction tyre A tyre designed primarily for the equipment of driven (trailed) axles of implements or agricultural machinery, excluding sustained high torque
24、 services Trailer tyre A tyre designed for the equipment of non driven (trailed) axles of implements agricultural machinery or trailers Logging service tyre Special design agricultural tyre suitable for forestry application High flotation tyres A class of tyres designed with larger volume that may p
25、rovide lower surface contact pressure than tyres with similar overall diameters typically with a 3-part size designation: (nominal overall diameter nominal section width) rim diameter code BS ISO 4251-4:2010ISO 4251-4:2010(E) ISO 2010 All rights reserved 3Table 2 Tyre classification code and tyre no
26、menclature Classification code Tyre nomenclature R Agricultural tractor drive wheel tyres R-1 R-1W R-1S R-2 R-3 R-4 Regular service (tread) Wet traction service Sprayer/spreader service Cane and rice service (deep tread) Flotation service (shallow tread) Industrial service (construction application)
27、 F Agricultural tractor steering wheel tyres (non-traction pattern) F-1 F-2 F-3 Single rib tread Multiple rib tread Flotation multi-rib (construction application) I Agricultural implement tyres I-1 I-2 I-3 I-4 I-5 I-6 Multi-rib tread Moderate traction service Traction tread Plough tail wheel service
28、 Steering service Smooth tread G Garden tractor tyres G-1 G-2 G-3 Traction service Flotation traction service Maximum flotation service LS Logging service tyres LS-1 LS-2 LS-3 LS-4 Regular tread Intermediate tread Deep tread Shallow tread HF Tread HF-1 HF-2 HF-3 HF-4 Shallow tread Regular tread Deep
29、 tread Extra deep tread BS ISO 4251-4:2010ISO 4251-4:2010(E) ICS 83.160.30 Price based on 3 pages ISO 2010 All rights reserved BS ISO 4251-4:2010This page has been intentionally left blankBS ISO4251-4:2010BSI GroupHeadquarters 389Chiswick High Road,London, W4 4AL, UKTel +44 (0)20 8996 9001Fax +44 (0
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